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This is a pretty cool story and quite fun. Nothing too special but it's enjoyable. Unfortunately, for some reason, Tom Baker doesn't get that much dialogue in this story which makes it feel a bit empty. The Doctor is there but he's not doing much, and he doesn't really seem to care either. He's just observing most of the time. Other than that, however, it's an enjoyable story.

A great sci-fi mashup where Dr. Jekyll and Mr.Hyde meets Forbidden Planet. This one is absolutely among my favorite DW serials ever. The planet surface sets are perhaps the most detailed and remarkable ones ever created for DW. Its hard to believe they were all created in-studio! It also boasts an outstanding guest cast, particularly Frederick Jaeger as Sorenson. As for the rest of the guest cast, this is the last appearance of Michael Wisher in DW, and Louis Mahoney will next appear in DW as the older Billy Shipton in Blink.